`Mental body, in occult philosophy, is that aspect of the human being
which resides on the mental level of abstract consciousness. This is the
part of the self which allows awareness of meaning. Existing outside of
space and time, it is the lowest part of the self to survive physical death.
A.G.H.

Source:

Greer, John Michael. The New Encyclopedia of the Occult.
St. Paul. MN. Llewellyn Worldwide. 2005. p. 304